工况约束的燃料电池多堆系统寿命优化方法

Life optimization method for fuel cell multi-stack system based on working conditions constraints

中文关键词  燃料电池多堆系统  老化衰减  功率分配  控制策略

英文关键词  multi-stack fuel cell systems  performance degradation  power distribution  control strategy

中文摘要

      本研究针对重型交通或大功率燃料电池多堆系统能量分配控制问题,通过获得燃料电池堆正常运行工况 谱下寿命预测情况及各电流密度工况点下预期寿命情况,对多堆燃料电池系统采用功率不均匀分配进行寿命优化. 利用运行工况对燃料电池系统内在健康状态的影响规律,考虑单堆系统单一运行工况的唯一性,利用功率约束、衰 减速率约束和多堆间衰减偏差约束将传统多堆系统单一运行工况拓展至适应可调的多运行工况,避免多堆系统采 用均匀分配下单堆性能衰减过快引起的整体系统寿命的大幅缩减.本研究对于提升燃料电池多堆燃料电池系统耐 久性,指导燃料电池多堆系统控制策略具有重要的实践意义.

英文摘要

      Aiming at the energy distribution control of multi-stack systems for heavy-duty transportation or high-power fuel cells, the life of multi-stack fuel cell systems is optimized by obtaining the life prediction under the normal operating conditions of fuel cell stacks and the life expectancy under each current density working point. Based on the influence of operating conditions on the intrinsic health state of the fuel cell system, considering the uniqueness of the single operating condition of the single-stack system, the power constraint, the attenuation rate constraint and the attenuation deviation constraint between multiple stacks are used to extend the single operating condition of the traditional multi-stack system to the adaptable multi-operation condition so as to avoid the significant reduction of the overall system life caused by the rapid performance decay of a single stack under the uniform distribution of the multi-stack system. This study has important practical significance for improving the durability of fuel cell multi-stack fuel cell systems and guiding the control strategy of fuel cell multi-stack systems.